|
Demographics
|
Control
|
Photocopier workers
|
p value
|
|---|
|
N
|
43
|
81
| |
|
Male (%)
|
30 (70)
|
64 (79)
|
0.253*
|
|
Age Mean (S.D)
|
31.7 (7.4)
|
32.6 (7.1)
|
0.467**
|
|
Monthly income(Rs)
| | | |
|
≤3000
|
1 (2)
|
2 (3)
|
0.047†
|
|
3001–10000
|
27 (63)
|
61 (75)
|
|
10000–20000
|
5 (12)
|
13 (16)
|
|
>20000
|
10 (23)
|
5 (6)
|
|
BMI Mean (S.D)
|
24.2 (4.0)
|
24.9 (6.2)
|
0.513**
|
|
Current smokers (%)
|
8 (19)
|
30 (37)
|
0.041*
|
|
Pack years Mean (S.D)
|
2.0 (1.8)
|
2.9 (4.6)
|
0.510**
|
|
Cumulative exposure (1000 s of hours)
| | | |
|
10 – 20
| |
13
| |
|
21 – 30
| |
30
| |
|
31–40
| |
13
| |
|
41 – 70
| |
15
| |
|
Alcohol use
|
11 (26)
|
30 (37)
|
0.232
|
- * - Chi square test; ** - Students t test; † − Fisher’s exact test.
-
BMI Body mass index; Pack years = (Average number of cigarettes per day/20) × number of years smoked.
- Cumulative exposure = No. of working hours/day × No. of working days/week × No. of years of exposure × 50 weeks/year.
